Printing-plate-shaving machine.



H. M. BARBER. PRINTING PLATE SHAVING MACHINE, APPLICATION FILED 0CT.31, 1910.

1,126,344 Patented Jan.26, 1915.

5 SHEETS-SHEET 1.

H. M. BARBER.

PRINTING PLATE SHAVING MACHINE. APPLICATION FILED 00T.31, 1910.

1,126,344., Patented Jan.26, 1915.

5 SHEETS-SHEET 2.

L/ @mW/yf H. M. BARBER. PRINTING PLATE SHAVING MACHINE. APPLICATION FILED 00131, 1910.

1.126,24@a Patented M1126, 1915.

5 SHEETS-SHEET s.

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H. M. BARBER. PRINTING PLATE SHAVING MACHINE. APPLICATION FILED 0011.31, 1910.

1,126,344., Patented Jan. 26, 1915.

5 SHEETS-SHEET 4.

wf' M M7 H. M. BARBER.- PRINTING PLATE SHAVING MACHINE. APPLICATION FILED 0011.31, 1910.

Lglc; Patented M1126, 1915.

5 SHEETS-SHEET 5.

UNXTED? STATES PATENT OFFICE.

HOWARD M. BARBER, OF STONINGTON, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, T0 C. B. COTTRELL & SONS COMPANY, OF NEW YORK, Y., A CORPORATION or DELAWARE.

PRINTING-PLATE-SHAVING MACHINE.

Patented J an. 26, 1915.

Original application led .T une 21, 1909, Serial No. 508,866. Divided and this application led October 31,

1910. Serial No. 589,995.

To all whom it may concern Be it known that I, HOWARD M. BARBER, a citizen of the United States, and resident of Stonington, in the county of New London and State of Connecticut, have invented anew and useful'Impi-ovement in Printing-Plate-Shaving Machines, of which the following is aspeciication. j

The objects lof my invention are to pro- Vide certain novel features in the construction, form .and arrangement of the several par-ts vof a printing plate shaving machine whereby a stop is provided for limiting the downward movement. of the knife; an accurate adjusting means is provided for the' 7 ing of the printing plate with the utmost accuracy.

In the accompanying drawings, Figure 1 represents the shaving machine in side elevation, the several parts being shown in full lines in the position which they assume when the machine is at rest with the reciprocating bed at the limit of its forward movement and in dotted lines when the reciprocating bed is at the limit of its rearward movement, Fig. 2 is a top plan View of the same, `Fig. 3 is a front end view of the machine, Fig. 4 is a detail view showing more clearly the `brake for stopping the reciprocating bed at the limits of its movement, Fig. .5 is a section taken in the plane of the line A-A of Fig. 4, looking in the direction of the arrows, Fig. 6 is an enlarged detail longitudinal vertical section, Fig. 7 is a detail transverse section through a portion of the machine showing one of the plate pressure rolls, Fig. 8 is a fragmentary horizontal section taken in thev plane of the line B--B of Fig. 6, looking in the vdirection of the4 arrows, Fig. 9 is a detail transverse section taken in the plane of the line- C-C of Fig. 6, looking in the direction of the arrows, and Fig. 10 is a detail plan view partia'lly in section showing the connections for automatically applyi-ngvthe `brake* tolimit the backward and forward movements of the bed.

The bed frame of the machine is denoted by 1 and vitssupporting legs by 2. The bed frame is provided with ways 3, for guiding the reciprocatingbed 4 'in its forward and rearward movements. The reciprocating bed 4 is provided with a rack 5, which rack is engaged by a reversing pinion 6 fixed to a cross shaft 7 suitably mounted in the :bed frame 1. This cross shaft 7 is driven by a worm and gear connection 8, 9, from a drive shaft 10, which shaft is in turn driven from any suitable source of power such, for instance, as a reversing motor 11, by a belt and pulley connection 12, 13, 14.

A motor controlling lever 15 is fixed to a cross rock shaft 16 supported by suitable hangers 17 from longitudinal tie rods 18 carried by the legs 2 of the framing. The motor controlling lever 15 is arranged to control the direction ofneovement of the motor shaft 19 through a controller 20 of any suitable design, the pinion 21 of which controller meshes with the teeth of a rack bar 22 connected to the lever 15.

It is to be understood that in the arrangement of the parts as herein shown, when the lever is swung forwardly the motor shaft will be driven in a direction to cause the reversing pinion 6 to drive the reciprocating bed rearwardly; when the lever is moved rearwardly the motor shaft will be driven in the reverse direction to cause the pinion 6 to drive the bed forwardly, and .when the lever is in its intermediate position the controller will be in its neutral position and the movement of the motor shaft stopped.

The shaving knife is denoted by 23 and it -is adjustable by means of screws 26 and clamped in its adjustments by means of set screws 25 upon a member 24 of the vertically movable knife carrying head 27, which head is suitably mounted between the up rising sides 28 of the bed frame l. member 24 of the knife carrying head 27 is in turn adjustably mounted upon the said knife carrying head as follows; An approximate adjustment of this knife carrying member 24 is provided for by means of vertical adjusting screws 29,` 30, rotatably mounted in the knife carrying head 27, which screws pass through interiorly threaded lugs A31, 32, projecting from the member 24 through vertically elongated recesses 33, 34, in the knife carrying head 27. Coil springs 35, 36, surround the screws 29, 30, andare interposed between `the bottoms of the recesses 33, 34, and the lugs 31, 32, respectively, for eliminating all lost motion beshaft 43 mounted on the knife carrying head 27, which worm may be moved into and out of mesh with a worm gear 44 fixed on the shaft 4 0 of the hand wheel 41. In the present instance, a hand lever 45 is provided for this purpose.A

Thercrank handle of the shaft 43 is de- A suitable disk scale 47 may be provided on the shaft 40 for accurately adjusting the vertical position ofthe knife with respect to the knife carrying head to a predetermined point. The knife is clamped rigidly to the knife carrying head in its predetermined vertical adjustment by providing l screw bolts 48 which enter the rear ends of the lugs 31, 32, between the heads of which bolts and theback face of the head 27 are interposed clamping lates 49. Vertical slots 50, 51, are provi ed through the rear wall of the recesses 33, 34, into which the rear ends of the lugs 31, 32, extend.

The knife carrying head 27 is moved toward and away from the traveling bed by -the following means: A rock shaftl 52 is mounted in the bed frame' 1 and beyond the bed frame upon both sides of the machine the shaft is provided with eccentric portions 53, 54, journaled in boxes 55, 56, which rest upon the 'horizontal bottom walls of the loops 57, 58, of frames 59, 60, secured to the opposite ends of the knife carrying head 27 as, for instance, by screw bolts' 61, 62. vThe lower ends of these loop frames 59, 6 0, are guided by pins 63, 64, supported 1n brackets 65, 66,-'projecting from the bed frame 1. The knife carrying head 27 is pressed upwardly under the strong tenslon of springs 67, 68, which also serve to hold the horizontal bottom walls of the loops 57, 58, of the frames 59, 60, snugly in engagement with the boxes 55, 56, carried by the eccentric portions 53, 54, of the cross rock shaft 52. Upon one side of the machine an operating lever 69 for manually raismg the knife carrying head at any time in the rearward movement of the'bed, is fixed to a concentric pin 70 extending outwardly from the eccentric portion 54 of the shaft 52.

The means for automatically controlling the raising and lowering of the knife carrying head by the movement of the reciproeating bed so that the shaving knife will be lowered before the bed starts on its rearward movement and raisedbefore the bed starts on its forward movement, is con- 65 structed, and arranged as follows; On the i movable pin 73 arranged to engage any one of a series of holes 74 along the side of the reciprocating bed 4. As the reciprocating bed 4 approaches the limit of its rearward movement, the front abutment 7l will engage the free end of an oarm 75 mounted upon a stud shaft 76 carried by the bed frame l. When the reciprocating bed 4 approaches the limit of its forward movement,

the abutment 72 will engage an arm 77 carried by a hub 78 mounted upon a stud shaft 79. A link bar 80 connects the arms 75 and 77 so that these two arms are moved together. The hub 78 is further provided with an arm 81 which is connected to anl arm 82 on the hub of the lever 69 by a connecting link 83 so that the shaft 52 is rocked by the rocking movement of the' arms 75 and 77 for automatic lly raising and lowering .the knife carryin head. The lever 15 is connected to the arm 75 by a lost motion connecting link 84, which link has a pin and slot connection 85, 86, with the said lever 15. This lost motion connection between the controlling lever 15 and the arm 75 permits the operator to throw the controlling lever 15 into its neutral position at any time during the rearward movement of the reciprocating bed 4 whenever the lever 69 is raised by hand for manually lifting the knife carrying head. 1 The rearward and forward movements o the bed are stopped by a brake mechanism under the control of the bed as follows: A band brake is located on the shaft 10, the brake drum being denoted by 87 and the brake band by 88. yThe band tightening lever is denoted by 89 and it is engaged by -a double cam 90 carried by an arm 91 fixed to a cross rock shaft 92 mounted in the bed frame 1 at the rear end of the machine. This shaft 92V is provided with'a depending arm 93 which is connected by a link rod 94 with an uprising arm 95, fixed to the rock shaft 16'upon which the controlling lever 15 is also fixed. This arm 95 is located at the opposite side of the machine fromrthe lever 15 and it is provided with a rearwardly extended bar 96 resting' in suitable guides 97, 98, on the bed frame 1, along the side of the reciprocating bed 4.- This bar 96 is provided with uprising lugs 99, 100. The reciprocating bed 4 is provided with a front fixed abutment 101 corresponding to the abutment 71 and a longitudinally adjustable rear abutment 102 'corresponding to the abutment 72. This rear abutment 102 is shown as a pin which may meest-fr be inserted through any one of a series of IholeslOB located along the side of the reciprocating bed 4c. These abutments 101, 102, are so placed that they will engage the .uprising lugs 99, 100, respectively, of the rearwardly extended bar 96 for moving the several arms and levers to apply the brake to stop the movement of the bed and for throwing the controlling lever 15 into its ineutral, position to stop the operation of the motor, as will hereinafter appear in descriptions of the operation of the machine.

`Suitable spring pressed rollers 104, 105,

vare arranged to the front and rear of the cutting edge ofthe shaving knife 23 in position to exert their pressure upon the back` ofthe printing plate being shaved. Each of these. rollers 104, 105, is `provided with Shanks 106,107, extending upwardly through the knife carrying member24, springs 108, 109, beingl provided for. yieldingly holding they rollers at the limit of their downward movement and adjusting nuts 110, 111, be-

ingprovided for adjustably limiting the downward movement of the said rollers. The downward movement of the knife carf rying head`27 is limited by vertically adjustable bolts 112 which have screw threaded engagements with lugs 113 on the uprising sides 28. of the bed frame 1, the heads thein proper adjusted position with respect to the knife carrying head.

In operation, supposing the parts to be in the position shown ,in full lines, Fig. 1., with the reciprocating bed at the limit of its forward movement, the controlling lever 15 in its neutral position andthe band brake applied and the motor at rest: The controlling lever 15 is swung forwardly into the position indicated by the line X-X, Fig. 1, the slot 86 in the link bar 84 permitting the lever 15 to be swung into this position without affecting the knife carrying head operating mechanism. This forward movement of the lever 15 will release the brake and, at the same time, start the motor. The bed will travel rearwardly underneath the shav- ,ing knife and as it approaches the limit of stopping the motor. Furthermore, as the reciprocating bed nears the limit of its rearward movement, the front stop 71 thereon will engage the arm 75 and move it rearwardly a sufficient distance to rock the shaft 52 for causing its eccentric portions 53, 54, to move upwardly to permit the springs 67, 68, to lift the knife carrying head 27 away from the reciprocating bed 4. If, at any time during the rearward movement of thebed l, it is desired to stop the shaving operation,

the lever 69 can be raised by hand thus permitting the spring 67, 68, to lift the knife carrying head and through the link connection 84 swing the controlling lever 15 into its intermediate position to stop the motor. After the reciprocating bed reaches the limit of its rearward movement and the knife carrying head is raised, the controlling lever 15 may oe moved rearwardly into the position indicated by the line Y--Y of Fig. 1, thus releasing the brake and reversing the motor. As the bed approaches the limit of its forward movement, the abutment 102 will engage the lug 100 of the bar 96 and Swing the uprising arm 95 forwardly a sufficient distance to move the double faced cam 90 into position to apply the brake. |This movement of the arm 95 will also rock the shaft 16 a sufficient distance to move the controlling -lever 15 into its intermediate position, thus stopping the motor.

By the construction, form and arrange ment of the several parts, as herein shown and described, it will be seen that by providinga positive limit for the downward movement of the knife carrying head and providing springs for raising the same, the headwill be held rigidly against movement when in its lowered position during, the

shavingvoperatiom thus permittmg the adj'ustment of the knife carrying member with the utmost accuracy. Furthermore, by providing the springs 35, 36, around the adjusting screws 29, 30, all lost motion is taken up at this point and a micrometer adjustment of the knife carrying member may be obtained after an approximate adjustment thereof has been obtained. It will furthermore be seen that both an automatic means is provided for raising the knife carrying head and a manually operated means is provided for obtaining this movement.

The parts shown and described but not claimed hereinwhich relate to the control of the brake and the motor by the reciprocating bed; the automatic raising and lowering of the knife and the automatic stopping of the motor at any desired point in the rearward movement of the bed, form the subject matter of my co-pending application filed July 21, 1909, serial No. 508866, of which this is a division.

What I claim is 1. In a machine of the character described, a knife carrying head, a reciprocating bed, a stop for limiting the downward movement of the head, springs tending to move the head away from the stop and means controlled by the bed for automatically bringing the head down into rigid engagement with the stop as the bed reaches a epredetermined point in its movement.

2. In a machinea of the character described, a knife carrying head, a knife carrying member, means for adjusting the knife carrying member approximately, a micrometer adjusting device for the knife carrying member and means for rendering the micrometer adjusting device operative and inoperativewith respect to said knife carrying member. y

3. In a machine of the character described, a knife carrying head, a knife carrying member, means for adjusting the knife carrying member approximately, a micrometer adjusting device for the knife carrying member, means for rendering the micrometer adjusting device operative and inoperative with respect to said knife carrying member and means for locking the knife carrying member in its adjusted position.

4. In a machine of the character described, a knife carrying head, a knife carrying member, adjusting screwsl carried by the head engaging the member and springs arranged in positlon to prevent lost motion between the adjusting screws and knife carrying member.

5. In a machine of the character described, a bed plate, a bed fitted to reciprocate thereon, a knife carrying head, sprlngs tendin to raise the knife carrying head away rom the bed plate, and a rock shaft havingY eccentric portions connected to thei head r drawing the head downwardly as the shaft is rocked in one direction and permitting the head to lift as the shaft is rocked in the opposite direction.

6. In a machine of the character described, a knife carrying head, a knife carrying member, means for adjusting thel knife carrying member approximately, a micrometer adjusting device including a worm and worm gear, and means for moving the Worm and worm gear into and out of engagement to render the micrometer adjusting device operative and inoperative with respect to said knife carrying member.

7. In a machine of the character described, a knife carrying head, a knife carrying member, means for adjusting the knife carrying' member approximately, a micrometer 'adjusting device including a worm and worm gear, means for moving the .worm and Worm gear into and out of engagement to render the micrometer adjusting device operativel and inoperative with respect to said knife carrying member, and means for locking the kmfe carrying member in its adjusted position.

In testimony, that I claim. the forego-` 

